Limekiln.



No. 677,418. Patented July 2, I901. G. &. J. G. LESPREANCE.

LIMEKILN.

(Application filed Oct. 26, 1900.

(No Model.)

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GILBERT LESPREANCE AND JOHN G. LESPREANOE, OF DETROIT, MICHIGAN.

LIMEKILN.

SPESIFIGATIGIT forming part Of Letters Patent N0. 677,418, dated July 2,1901. Application filed October 26, 1900. Serial No. 34,423. (No model.)

To (all whom it WLQLZ/ concern:

Be it known that we, GILBERT LEsPREANCE and JOHN G. LEsPREANoE, citizensof the United States of America, residing at Detroit, in the county of\Vayne and State of Michigan, have invented certain new and usefulImprovements in Limekilns, of which the following is a specification,reference being had therein to the accompanying drawings.

This invention relates to new and useful improvements in kilns forburning lime-rock, and has for its object to produce a portable kilnwhich will not readily burn out and will cook the lime evenly throughoutand at the same time produce a pure lime especially adapted for glassmanufacturers. lVith the ordinary limekiln in which brick or stone isused the limestones of the charge and the bricks contained in the wallwill adhere to each other when the mass becomes heated, and as a resultwill pull out the bricks in the wall as the mass slowly descends,thereby necessitating the frequent repairing of the kiln and at the sametime mixing foreign ingredients with the lime, which greatly lowers thequality of the same, and, further, with a brick or stone kiln the wallssoon become heated and as a result the lime cooks much faster near theWalls than in the center, producing an article of varying grade, Whilewith our construction the walls are constantly kept at a temperature sothat the lime is cooked equally throughout, thus producing a superiorarticle. To this end the kiln consists of a substructure or ash-pitsection and a super-' structure of iron detachably supported thereon,provided with a water-jacket extending from the bottom to near the topof the superstructure in contact with the inner wall thereof and meansfor feeding the water therethrough, all substantially as shown and described in the accompanyingspecification and drawings, in which Figure 1is an end elevation of the limekiln. Fig. 2 is a vertical centralsection through the superstructure at right angles to Fig. 1, showingthe base in elevation. Fig. 3 is a vertical central section at rightangles to Fig. 2 through the superstructure. Fig. 4 is a section on linea: :r, Fig. 2.

As shown in the drawings, the stack orfiue is preferably constructed intwo or more sections A B, of which A is the upper section and B thelower section, detachably united together at their meeting ends by meansof circumferential plates a 1) to form a watertight joint, each sectionbeing provided with an inner and outer wall 0 (Z, preferably ex tendingfrom the bottom to near the top of the superstructure and formingbetween them a water-space, the whole of the superstructure, includingthe furnace-chambers at the base, being made with a water-jacket toprofeet the iron and maintain the walls at a uniform temperature, coldwater being admitted in at the top through the pipe 2, as desired, partoverflowing through the overflowpipe f and part running out at thebottom through the valved pipes g h. The inner and outer walls of thekiln are suitably braced by stay-bolts in the same manner as used inboiler construction.

The lower portion of the stack or flue is conically contracted at O, asshown, to prevent the burnt lime from being fed down too fast, and D Eare the furnacechainbers, preferablyintegrally formed with the uprightcylindrical portion at or near its lower end, the entire furnace chamberbeing Waterjacketed, including the central partition or supporting-Wall2'.

j represents the furnace-door openings, also surrounded by water, and jrepresents the bridge-walls for the furnace, which may be made integralwith the superstructure or built up from the ash-pit, as shown.

The superstructure is set upon a suitable brick or stone foundation E,provided with arched openings F, from which the burnt lime is removed asit is discharged by the hopper k.

lrepresents the ash-pit doors, and m the grates for the furnace, while Grepresents vertical supporting-columns adapted to set on top of thefoundation to support the receiving-hopper of the kiln, although the useof these columns may be dispensed with.

n is a manhole in the side of the kiln for the purpose of interioraccess, and 0 p are peepholes near the top and bottom of the kiln,respectively, and also for the purpose of inserting a rod therein toloosen the limestone should they become lodged.

It will also be seen that with the use of the central wall 'i andfire-wall j the lime is prevented from falling into thefurnace-chambers, as the openings are not of such a size as wouldreadily admit the limestone, which would be the case if said walls weredispensed with, said walls at the same time acting to support the lowerend of the kiln. With our construction the cost of building and maintaining such a kiln is greatly reduced, and should it not be profitableto operate the kiln at one place by reason of failure of the supply ormarket it'can be quickly taken down, loaded on the cars, and shipped tosuch location where the material is at hand and the market good.

Having thus fully described our invention, what we desire to secure byLetters Patent 1s- 1. A limekiln composed of a substructureof brickextending up and forming the ash pit section and a superstructureremovably supported thereon and composed of an enlarged base-sectionforming the furnace-chamber, and a stack or flue supported on thebasesection having its lower end surrounded by the same, the stack andbase-section being composed of inner and outer walls of sheetironforming between them a Water-space continuous throughout the whole andin contact with theinner wall of the structure and means for circulatingwater through said waterspace.

2. A limekiln consisting of the ash-pit section of brick and asuperstructure supported thereon and integrally composed of a lower orbase section forming the combustion-chamber and a stack having acontracted portion at or near the lower end, said base-section and stackbeing formed with inner and outer walls of sheet-iron forming a spacebetween them continuous throughout the Whole and forming a water-jacketin contact with the whole of the inner wall of the structure and meansfor supplying water thereto.

3. A limekiln composed of an ash-pit section of brick and a stackremovably supported upon said ash-pit section, said stack being formedof an inner and an outer concentric wall of iron extending from near thebottom to near the top thereof to form a continuous water-chamber aroundthe stack and adapted to protect the inner wall of the stack, havingsuitable inlets and outlets for the water con tained therein, andfurnace-chambers adjacent to and communicating with the interior of thestack, at or near the base thereof.

4. In a limekiln, the combination with a substructure of brick formingthe ash-pit sec tion and the vertical bottom outlet of the kiln, of astack formed of a single structure of iron removably supported thereon,said stack being formed of concentric inner and outer walls formingbetween them a hollow space continuous throughout the stack from thebottom to near the top and constituting a water-jacket around the wholeof the inner wall of the structn re, provided with suitable inlet andoutlet pipes to maintain the water therein said stack havingfurnace-chambers on opposite sides of the base adjacent to andcommunicating with theinterior of the stack.

5. In a limekiln, the'combination with a substructure of brick formingthe ash-pit section and adapted for the removal of the burnt lime fromthe bottom, of a superstructure removably supported thereon and forminga single portable structure, comprising a stack formed of concentricinner and outer walls forming between them a waterspace and furnacechambers on opposite sides of the stack formed of inner and outer wallsforming between them a water-space communicating with the water-space ofthe stack and means for feeding and regulating the flow of water throughsaid space.

6. In a limekiln, the combination with a substructure of brick formingthe ash-pit section and adapted for the removal of the burnt lime, of asuperstructure removably supported thereon composed of an upper andlower section detachably secured together at their meeting ends andcomprising a hopper at its upper end, a discharge-hopper and furnace-chambers at its lower end, and a stack or fine intermediate saidends, said stack and furnace-chamber being composed of an inner andouter wall forming between them a space constituting a water-jacketaround the whole of the inner wall of the structure, provided withsuitable inlet and outlet pipes to maintain the water therein.

7. In a limekiln, the combination with a substructure of brick formingthe ash-pit section and adapted for the removal of the burnt lime, of asuperstructure removably supported thereon ,comprising a stack formed ofconcentric inner and outer walls forming between them a water-space andfurnacechambers on opposite sides of the stack formed of inner and outerwalls forming between them a waterspace communicating with thewater-space of the stack, and a vertical central hollow partition-wallforming a water-space dividing each of said furnace chambers into twocompartments opening into said stack and means for supplying water tosaid water-space.

8. In alimekiln forburninglime, the combination with the supporting-baseof the superstructure removably mounted thereon comprising the stackportion having a hopper at its upper end and contracted portion 0 at itslower end, lateral furnace-chambers D E on opposite sides of saidcontracted portion of the stack and communicating therewith, said stackand furnace-chambers being composed of the inner and outer walls 0 clforming a water-space between the same, the supply and discharge pipes ef communicating with said water-space and the peep-holes 0 19 connectingsaid inner and outer walls through said water-space.

In testimony whereof we affix our signatures in presence of twowitnesses.

GILBERT LESPREANCE. JOHN G. LESPREANCE.

Witnesses:

OTTO F. BARTHEL, JOSEPH A. NOELKE.

